Opening and closing valve



FIG. 1 is a front, top, and right side perspective view of an opening and closing valve;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of the front elevational view;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken lines in the drawings illustrate subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for an opening and closing valve, as shown and described. 